Semantic priming effect during REM-sleep inertia in patients with narcolepsy

Mazzetti, Michela; Campi, Claudio; Mattarozzi, Katia; Plazzi, Giuseppe; Tuozzi, Giovanni; Vandi, Stefano; Vignatelli, Luca; Cipolli, Carlo

doi:10.1016/j.brainresbull.2006.09.011

Cited by 17 publications

(5 citation statements)

References 43 publications

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“…For example, Stickgold et al concluded that their findings help explain the "bizarre and hyperassociative nature of REM sleep dreaming" (page 188 in the Stickgold et al study). 8 Similarly, Mazzetti et al 63 suggest that the integrative processes of dreaming are implicated in the altered spread of semantic activation reflected by their priming effect. Although we also postulate that our findings reflect the hyperassociativity of semantic networks during REM sleep, and although additional analyses of our detailed mentation samples may yet provide support for the claim that dreaming participates in this hyperassociativity, nothing reported in the current results directly supports this more general claim.…”

Section: A Possible Role For Dreaming?mentioning

confidence: 99%

Morning REM Sleep Naps Facilitate Broad Access to Emotional Semantic Networks

Carr

Nielsen

2015

Sleep

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Section: A Possible Role For Dreaming?mentioning

confidence: 99%

Morning REM Sleep Naps Facilitate Broad Access to Emotional Semantic Networks

Carr

Nielsen

2015

Sleep

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“…Despite this, performance decrements in choice reaction and subtraction tasks are apparent upon awakening in patients with narcolepsy with cataplexy [68, 69]. Compared to controls, however, patients with narcolepsy with cataplexy have relatively preserved performance on a semantic priming task upon awakening from REM (compared to their own wake baseline) [70]. Clinical series suggest that patients with narcolepsy, with or without cataplexy, sometimes endorse sleep drunkenness (see Table 6).…”

Section: Sleep Inertia/sleep Drunkenness In People With Sleep Disordersmentioning

confidence: 99%

Waking up is the hardest thing I do all day: Sleep inertia and sleep drunkenness

Trotti

2017

Sleep Medicine Reviews

160

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Summary The transition from sleep to wake is marked by sleep inertia, a distinct state that is measurably different from wakefulness and manifests as performance impairments and sleepiness. Although the precise substrate of sleep inertia is unknown, electroencephalographic, evoked potential, and neuroimaging studies suggest the persistence of some features of sleep beyond the point of awakening. Forced desynchrony studies have demonstrated that sleep inertia impacts cognition differently than do homeostatic and circadian drives and that sleep inertia is most intense during awakenings from the biological night. Recovery sleep after sleep deprivation also amplifies sleep inertia, although the effects of deep sleep vary based on task and timing. In patients with hypersomnolence disorders, especially but not exclusively idiopathic hypersomnia, a more pronounced period of confusion and sleepiness upon awakening, known as “sleep drunkenness”, is common and problematic. Optimal treatment of sleep drunkenness is unknown, although several medications have been used with benefit in small case series. Difficulty with awakening is also commonly endorsed by individuals with mood disorders, disproportionately to the general population. This may represent an important treatment target, but evidence-based treatment guidance is not yet available.

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“…This suggestion-which is fully compatible with previous indications that the perceptual vividness, bizarreness and drama of dream experience reach their highest levels in the second half of the night (Foulkes and Schmidt, 1983;Snyder, 1970)-is also made plausible by some further experimental findings. In particular, the processing of masked stimuli and the access to weakly related items of semantic information in memory (as measured with a priming task during the period of sleep inertia; Mazzetti et al, 2006;Stickgold et al, 1999) are more effective during REM sleep of the late night. Moreover, the length and complexity of dream-stories reported by patients with Parkinson's disease after awakening from REM sleep are correlated with the psychometric indices of global cognitive functioning, as estimated in waking .…”

Section: Discussionmentioning

confidence: 99%

Time‐of‐night variations in the story‐like organization of dream experience developed during rapid eye movement sleep

Cipolli

Guazzelli

Bellucci

et al. 2014

Journal of Sleep Research

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Summary This study aimed to investigate the cycles (2nd/4th) and duration‐related (5/10 min) variations in the story‐like organization of dream experience elaborated during rapid eye movement (REM) sleep. Dream reports were analysed using story grammar rules. Reports were provided by those subjects (14 of 22) capable of reporting a dream after each of the four awakenings provoked in 2 consecutive nights during REM sleep of the 2nd and 4th cycles, after periods of either 5 or 10 min, counterbalanced across the nights. Two researchers who were blind as to the sleep condition scored the dream reports independently. The values of the indicators of report length (measured as value of total word count) and of story‐like organization of dream reports were matched taking time‐of‐night (2nd and 4th cycles) and REM duration (5 versus 10 min) as factors. Two‐way analyses of variance showed that report length increased significantly in 4th‐cycle REM sleep and nearly significantly for longer REM duration, whereas the number of dream‐stories per report did not vary. The indices of sequential (number of statements describing the event structure developed in the story) and hierarchical (number of episodes per story) organization increased significantly only in dream‐stories reported after 10 min of 4th‐cycle REM sleep. These findings indicate that the characteristics of structural organization of dream‐stories vary along with time of night, and suggest that the elaboration of a long and complex dream‐story requires a fairly long time and the availability of a great amount of cognitive resources to maintain its continuity and coherence.

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Semantic priming effect during REM-sleep inertia in patients with narcolepsy

Cited by 17 publications

References 43 publications

Morning REM Sleep Naps Facilitate Broad Access to Emotional Semantic Networks

Morning REM Sleep Naps Facilitate Broad Access to Emotional Semantic Networks

Waking up is the hardest thing I do all day: Sleep inertia and sleep drunkenness

Time‐of‐night variations in the story‐like organization of dream experience developed during rapid eye movement sleep

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